package com.kgc.scd.util;

import org.springframework.stereotype.Component;

import java.time.LocalDate;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;

/**
 * Created On : 2022/11/16.
 * <p>
 * Author : yantao
 * <p>
 * Description: JudgingTimeUtil
 */
@Component
public class JudgingTimeUtil {

    /**
     * @author : yantao
     * @date   : 2022/11/16
     * @param  : [date1, date2]
     * @return : boolean
     * @description : 判断是否是同一天
     */
    public boolean isSameDay(Date date1, Date date2) {
        LocalDate localDate1 = date1.toInstant()
                .atZone(ZoneId.systemDefault())
                .toLocalDate();
        LocalDate localDate2 = date2.toInstant()
                .atZone(ZoneId.systemDefault())
                .toLocalDate();
        return localDate1.isEqual(localDate2);
    }

    /**
     * date2比date1多的天数
     * @param date1
     * @param date2
     * @return
     */
    public int differentDays(Date date1,Date date2) {
        Calendar cal1 = Calendar.getInstance();
        cal1.setTime(date1);

        Calendar cal2 = Calendar.getInstance();
        cal2.setTime(date2);
        int day1= cal1.get(Calendar.DAY_OF_YEAR);
        int day2 = cal2.get(Calendar.DAY_OF_YEAR);

        int year1 = cal1.get(Calendar.YEAR);
        int year2 = cal2.get(Calendar.YEAR);
        if(year1 != year2) {//同一年
            int timeDistance = 0 ;
            for(int i = year1 ; i < year2 ; i ++)
            {
                if(i%4==0 && i%100!=0 || i%400==0)    //闰年
                {
                    timeDistance += 366;
                }
                else    //不是闰年
                {
                    timeDistance += 365;
                }
            }

            return timeDistance + (day2-day1) ;
        } else {// 不同年
            System.out.println("判断day2 - day1 : " + (day2-day1));
            return day2-day1;
        }
    }
}
